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Prothena Corporation PLC

PRTA

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8.120USD

-0.290-3.45%

Close 07-31 16:00（ET）Quotes delayed by 15 min

425.11MMarket Cap

LossP/E TTM

Prothena Corporation PLC

8.120

-0.290-3.45%

TradingKey Stock Score Overall Financial Health Valuation Dimensions Earnings Forecast Price Momentum Institutional Confidence Risk Assessment

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Company

TradingKey Stock Score Overall Financial Health Valuation Dimensions Earnings Forecast Price Momentum Institutional Confidence Risk Assessment

Institutional Confidence

Currency: USD Updated: 2026-07-31

Previous score

10.00

Change

The current institutional shareholding score of Prothena Corporation PLC is 10.00, ranking 1 out of 385 in the Biotechnology & Medical Research industry. The latest institutional shareholding proportion is 96.24%, representing a quarter-over-quarter increase of 19.52%. The largest institutional shareholder is James Simons, holding a total of 0.00 shares, representing 1.14% of shares outstanding, with 1.76% decrease in holdings.

Institutional Shareholding

Shareholder Activity

Name

Shares Held

Chg %

Fidelity Management & Research Company LLC

7.55M

-4.43%

Scully (William P)

5.28M

-1.31%

Fennell (Todd W.)

4.50M

+3.33%

Rubric Capital Management LP

3.68M

+138.73%

BlackRock Institutional Trust Company, N.A.

3.33M

+12.04%

State Street Investment Management (US)

2.27M

+151.69%

D. E. Shaw & Co., L.P.

1.68M

+27.82%

Armistice Capital LLC

1.50M

-17.76%

Adar1 Capital Management LLC

1.46M

-0.77%